Cheng-Wen Lai

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Chia-Yi Hsien, TW

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Patents Grantslast 30 patents

Information Patent Grant
Lock set with improved spindle construction
- Patent number 5,927,777
- Issue date Jul 27, 1999
- Tong Lung Metal Industry Co., Ltd.
- Ching-Chuan Kuo
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Lock set with improved spindle construction
- Patent number 5,788,296
- Issue date Aug 4, 1998
- Tong-Lung Metal Industry Co., Ltd.
- Ching-Chuan Kuo
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Reinforcing apparatus for a lever handle of a door lock
- Patent number 5,666,833
- Issue date Sep 16, 1997
- Tong-Lung Metal Industry Co., Ltd.
- Sheen-Youl Gao
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Inner handle assembly of cylinder lock
- Patent number 5,562,317
- Issue date Oct 8, 1996
- Tong-Lung Metal Industry Co., Ltd.
- Ching-Chuan Kuo
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES